VBrick Systems VB5000 - Manual (Page 88)

80 © 2009 VBrick Systems, Inc.
the top portion of the screen. If the test is interrupted by pressing the Stop button, the
results of the test prior to termination will be displayed.
Diagnostics: Network Tests > Trace Route Test
The Internet is a large and complex aggregation of network hardware, connected together by
gateways. Tracking the route packets follow or finding a gateway where the packets are being
discarded is difficult. The Trace Route test attempts to trace the route an IP packet follows to
a specified Internet host. This test utilizes the Time To Live (TTL) field in the IP header to
allow intermediate nodes to be "discovered" via Internet Control Message Protocol (ICMP).
Intermediate hops are discovered by launching probe packets with a small TTL and then
listening for an ICMP Time Exceeded reply from a gateway. Use
Refresh
,
Start
/
Stop
, and
Default
to run the test.
Address Mode Select IP Address or Host Name and enter a corresponding value.
Number of Packets Number of packets to send for the test (default = 4).
PDU Protocol Description Unit size of packets, in bytes (default = 64).
Transmit Interval In seconds (default is sending the packets in 1 second intervals).
Transmit Timeout The length of time, in seconds, before the test times out, in the
event the target device fails to respond.